/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You under the Apache License, Version 2.0
 * (the "License"); you may not use this file except in compliance with
 * the License.  You may obtain a copy of the License at
 *
 *    http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.apache.spark.sql.execution.command.management

import org.apache.spark.sql.{CarbonEnv, GetDB, Row, SparkSession}
import org.apache.spark.sql.catalyst.expressions.Attribute
import org.apache.spark.sql.execution.command.{Checker, DataProcessCommand, RunnableCommand}
import org.apache.spark.sql.hive.CarbonRelation

import org.apache.carbondata.api.CarbonStore

case class CarbonShowLoadsCommand(
    databaseNameOp: Option[String],
    tableName: String,
    limit: Option[String],
    override val output: Seq[Attribute])
  extends RunnableCommand with DataProcessCommand {

  override def run(sparkSession: SparkSession): Seq[Row] = {
    processData(sparkSession)
  }

  override def processData(sparkSession: SparkSession): Seq[Row] = {
    Checker.validateTableExists(databaseNameOp, tableName, sparkSession)
    val carbonTable = CarbonEnv.getInstance(sparkSession).carbonMetastore.
      lookupRelation(databaseNameOp, tableName)(sparkSession).asInstanceOf[CarbonRelation].
      tableMeta.carbonTable
    CarbonStore.showSegments(
      GetDB.getDatabaseName(databaseNameOp, sparkSession),
      tableName,
      limit,
      carbonTable.getMetaDataFilepath
    )
  }
}
